diff --git a/src/main/cpp/t01_sort.cpp b/src/main/cpp/t01_sort.cpp
index da3b2a98..58f50d8a 100644
--- a/src/main/cpp/t01_sort.cpp
+++ b/src/main/cpp/t01_sort.cpp
@@ -18,11 +18,22 @@
 //1 2 3 4 5
 
 #include "t01_sort.h"
+#include <algorithm>
 #include <iostream>
 
 
 using namespace std;
 
 int t01_sort() {
+    int N;
+    cin >> N;
+    int a[N];
+
+    for (int i = 0; i < N; i++) cin >> a[i];
+
+    sort(a, a + N);
+    
+    for (int i = 0; i < N; ++i) cout << a[i] << ' ';
     
+    return 0;
 }
diff --git a/src/main/cpp/t02_shoes.cpp b/src/main/cpp/t02_shoes.cpp
index e47c6dd9..7fcd1970 100644
--- a/src/main/cpp/t02_shoes.cpp
+++ b/src/main/cpp/t02_shoes.cpp
@@ -33,5 +33,29 @@
 using namespace std;
 
 int t02_shoes() {
-    
+    int size, N;
+    int  coup = 0;
+    cin >> size >> N;
+    int a[N];
+
+    for (int i=0; i < N; i++) cin >> a[i];
+
+
+    for (int i = 0; i < N; i++)
+        if (size < a[i]) {
+            size = a[i];
+            coup ++;
+            break;
+        }
+
+    for (int i = 0; i < N; i++)
+        if (a[i] - size >= 3)
+        {
+            size = a[i];
+            coup ++;
+        }
+
+
+    cout << coup;
+    return 0;
 }
diff --git a/src/main/cpp/t03_points.cpp b/src/main/cpp/t03_points.cpp
index 311c4fc6..086d9a98 100644
--- a/src/main/cpp/t03_points.cpp
+++ b/src/main/cpp/t03_points.cpp
@@ -22,11 +22,38 @@
 //2 3
 
 #include "t03_points.h"
+#include <vector>
+#include <math.h>
+#include <algorithm>
 #include <iostream>
 
 
 using namespace std;
 
+struct point {
+    int x;
+    int y;
+    double r;
+};
+
+bool test(point v1, point v2)
+{
+    return v1.r < v2.r;
+};
+
 int t03_points() {
-    
-}
+    int n;
+    cin >> n;
+    vector <point> v(n);
+
+    for (int i = 0; i < n; i++) {
+        cin >> v[i].x >> v[i].y;
+        v[i].r = sqrt( v[i].x * v[i].x + v[i].y * v[i].y );
+    }
+
+    sort(v.begin(), v.end(), test);
+
+    for (int i = 0; i < n; i++)
+        cout << v[i].x << ' ' << v[i].y << endl;
+    return 0;
+}
\ No newline at end of file
diff --git a/src/main/cpp/t04_students.cpp b/src/main/cpp/t04_students.cpp
index 820127cf..c320bf26 100644
--- a/src/main/cpp/t04_students.cpp
+++ b/src/main/cpp/t04_students.cpp
@@ -28,11 +28,41 @@
 //Sergey Petrov
 
 #include "t04_students.h"
+#include <vector>
+#include <algorithm>
 #include <iostream>
 
 using namespace std;
 
+struct student {
+    string family;
+    string name;
+    int math;
+    int phys;
+    int comp;
+    double mean;
+};
+
+bool test(student v1, student v2)
+{
+    return v1.mean > v2.mean;
+}
+
 int t04_students() {
-    
+    int n;
+    cin >> n;
+    vector <student> v(n);
+
+    for (int i = 0; i < n; i++)
+    {
+        cin >> v[i].family >> v[i].name >> v[i].math >> v[i].phys >> v[i].comp;
+        v[i].mean = v[i].math + v[i].phys + v[i].comp;
+    };
+
+    sort(v.begin(), v.end(), test);
+
+    for (int i = 0; i < n; i++)
+        cout << v[i].family << ' ' << v[i].name << endl;
+    return 0;
 }